考虑边界层发展时溢流反弧段动水压强的确定

Study of Regularity about Pressure Distribution in the Bucket of Spillway Considering the Development of Boundary Layer

摘要: 溢流反弧段流线的曲率呈沿程变化,而反弧上下切点位置处边壁曲率却发生突变。通过在反弧上下切点位置补充定义使其曲率连续,并假定在该位置附近流线曲率呈线性变化,考虑了重力及离心力的影响,计入边界层发展,推出溢流反弧段动水压强计算公式,验证表明,该公式正确可靠。

Abstract: The steamline curve ratio in the bucket of a spillway gradually changes in the flow direction,but the wall curve ratio changes in the point of contact of the bucket suddenly.To coordinate the streamline curve ratio with the wall curve ratio,the definition of the curve ratio in the point of contact of the bucket is replenished,it is supposed that the curveratio in the vicinity of the point of contact of the bucket is a linear relation,the gravity and centrifugal force and the development of the boudary layer are taken into account,the pressure for mulas in the bucket of a spillway is developed.With the help of the testing data,the validity and reliability about the formulas is verified.